NaOH亚熔盐强化分解锆英砂新过程的机理研究

Zirconium oxychloride was an important products, the traditional production process of alkali fusion have many defects, such as high reaction temperature, poor mass transfer, high alkali consumption, waste emissions. In this project, a novel technology was presented which decompose zircon in sub-molten alkali system. The research were focused on the following aspects: the effects of structural minerals and properties in zircon by mechanical activation, thermodynamic and kinetic on zircon decomposition in NaOH sub-molten system, variation and regulation of mineral phase, structure during the reaction, and green separation process, NaOH recycling, based on the results, the mechanism of zircon decomposition in liquid alkali system were obtained. The purpose of research were realizing effective decomposition of zircon in lower temperature and recycling of NaOH medium. This research not only can provide the necessary theory evidence and reference for developing the environment friendly process of zirconium oxychloride production, it also has important significance to improve technical level of our country and realize the sustainable development of zirconium industry.

本项目针对传统氧氯化锆生产工艺中锆英砂碱熔分解过程反应温度高、传质差、碱耗高、废碱液排放量大的难题，提出开展NaOH亚熔盐强化分解锆英砂新过程的基础研究。通过研究机械活化对锆英砂矿相结构及性质的影响，NaOH亚熔盐分解锆英砂的热力学及反应动力学，以及分解过程物相、结构变化规律及调控机制，组分绿色相分离及介质再生循环规律，获取亚熔盐强化分解锆英砂的反应机理及调控规律，实现在较低温度下锆英砂的高效分解和介质循环利用。本项目研究可为解决传统锆英砂碱熔分解过程难题，研发环境友好的氧氯化锆清洁制备新工艺提供必须的基础和技术参考依据，对提高我国氧氯化锆工艺水平，实现锆行业的可持续发展也具有重要的意义。

本项目针对传统氧氯化锆生产工艺中锆英砂碱熔分解过程反应温度高、传质差、碱耗高、废碱液排放量大的难题，提出开展NaOH亚熔盐强化分解锆英砂新过程的基础研究。通过研究机械活化对锆英砂矿相结构及性质的影响，NaOH亚熔盐分解锆英砂的热力学及反应动力学，以及分解过程物相、结构变化规律及调控机制，组分绿色相分离及介质再生循环规律，获取亚熔盐强化分解锆英砂的反应机理及调控规律，实现在较低温度下锆英砂的高效分解和介质循环利用。本项目研究可为解决传统锆英砂碱熔分解过程难题，研发环境友好的氧氯化锆清洁制备新工艺提供必须的基础和技术参考依据，对提高我国氧氯化锆工艺水平，实现锆行业的可持续发展也具有重要的意义。